13. A (has finished ⇒ finished)

DHNB: last night (QKD)

S + V2/ed 

14. C (has been ⇒ was)

HTHT + since + QKĐ

S + was/were  : thì QKĐ

15. B (will take ⇒ would take)

S + told + O + (that) + S+ V (lùi thì)

will ⇒ would 

16. C (arrives ⇒ arrived)

S + said (that) + S+ V (lùi thì)

TLĐ + when + HTĐ 

TLĐ --> would 

HTĐ --> QKĐ

17. D (graduates ⇒ graduated)

S + told + O + (that) + S+ V (lùi thì)

TLĐ + after + HTĐ

TLĐ --> would 

HTĐ --> QKĐ

18. B (can't remember ⇒ couldn't remember) 

S + said to + O + (that) + S+ V (lùi thì)

can --> could 

19. C (had been sold ⇒ had sold)

S + had  + V3/ed: thì QKHT 

20. A (has canceled ⇒ has been canceled)

S + has/have + been + V3/ed: bị động  - thì HTHT

21. B (were build ⇒ were built)

S + was/were + V3/ed: bị động - thì QKĐ

22. A (was be rearranged ⇒ was rearranged) 

S + was/were + V3/ed: bị động - thì QKĐ

23. B (were made ⇒ was made)

S + was/were + V3/ed: bị động - thì QKĐ

Every + N --> S số ít 

24. B (are infecting ⇒ are infected) 

S + am/is/are + V3/ed: bị động - thì HTĐ

`color{orange}{~MiaMB~}`